Journal
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
Volume 13, Issue 4, Pages -Publisher
NATL INST MATERIALS SCIENCE
DOI: 10.1088/1468-6996/13/4/045007
Keywords
zirconium diboride; silicon nitride; oxide additives; low-temperature densification; high strength
Categories
Ask authors/readers for more resources
Two compositions of ZrB2-based ceramic composites containing Si3N4, Al2O3 and Y2O3 have been hot-pressed at different temperatures between 1673 and 1773K for 60 min in vacuum. The densification behavior of the composites was examined during the sintering process. The microstructures of the composites were characterized by scanning electron microscopy, and the crystalline phases were identified by x-ray diffraction. The effects of Al2O3 and Y2O3 additives on the densification behavior and flexural strength were assessed. A relative density of similar to 95% was obtained after sintering at 1723K or higher temperatures. The microstructures of the composites consisted of (Zr, Y)B-2, alpha-Si3N4 and Y-3(Al, Si)(5)O-12 phases. The room-temperature flexural strength increased with the amount of additives and approached 1 GPa.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available